Herd immunity, also known as population immunity, is a concept used for vaccination. In herd immunity, the vast majority of a population are vaccinated, lowering the overall amount of virus spread in the whole population. Health experts have noted that…
미 백신 책임자 “내년 5월쯤 집단면역 기대…12월11일 첫 접종” The head of the U.S. vaccine program says Americans could start receiving COVID-19 vaccines in a matter of weeks. However, a wide distribution of a working COVID-19 vaccine for children won’t…